NexaCode

PLC Process Logic for Machines and Systems

With NexaCode, you implement process logic on a standardized yet flexible PLC basis. State models, sequential function charts, operating modes, interlocks, restart behavior, and error handling are built in a comprehensible manner so that machine sequences function more robustly, can be tested faster, and remain manageable in subsequent projects.

Overview

Complex processes, sequences, and state logic implemented cleanly

The process logic is the part of the PLC software where the actual machine function is created. This is where it is decided how systems start, stop, reference, process products, react to faults, and safely restart after interruptions. If this part of the software grows in an unstructured manner, testing, modifications, and commissioning quickly become complex, error-prone, and difficult to manage. This is precisely where NexaCode comes in: individual process logic can be built specifically and traceability on a standardized software basis. Sequential function charts, state models, releases, interlocks, and error scenarios are not programmed in isolation but are linked together in a clear logic. This ensures that the software remains flexible for machine-specific requirements while also being maintainable throughout its entire lifecycle.

Core Functions

Central Building Blocks of Structured Process Logic

State clarity
Neatly structure state and operating mode logic
Automatic mode, manual operation, setup, referencing, fault, or restart must all work together in a clearly defined way in a machine. NexaCode helps to build these states comprehensibly and to clearly differentiate them from each other.
Process Transparency
Building Step Sequences and Sequences in an Understandable Way
Processes are broken down into logical steps, transitions, and actions. This simplifies reviews, testing, and later adjustments, as process steps are not hidden in scattered code fragments.
Dependency control
Master Interlocks, Releases, and Dependencies
Production processes depend on sensors, axis positions, time conditions, material availability, and releases from other modules. A clean structure prevents such dependencies from growing unmanageably or being implemented inconsistently in multiple places.
Fault tolerance
Implement robust error handling and recovery
Faults, acknowledgments, defined reset points, and controlled restarts are all part of good process logic. They ensure that machines not only function in ideal conditions but also remain manageable in the event of a fault.
Your Benefits

Why clean process logic pays off in projects

Clearly structured process logic enables more efficient development, better comprehensibility, and targeted testing of processes.

Time-saving
Implement machine processes more clearly and robustly
When states, steps, and transitions are structured comprehensibly, machines react more stably to real operating conditions, operator interventions, and malfunctions.
Quality Assurance
Better prepare for testing and commissioning
Structured process logic can be simulated, reviewed, and tested in test cases more precisely. This reduces troubleshooting efforts and coordination loops on site.
Regulatory compliance
Implement changes more controllably
New process steps, variants, or special functions can be added more effectively on a clear logical basis without unnecessarily destabilizing existing processes.
Easy to maintain
Sustainably improve knowledge retention within teams
When process logic is structured according to recognizable patterns, new employees, commissioning engineers, and service teams more quickly understand how the machine works and where changes need to be made.
Future viability
Less risk in complex systems
Especially with chained modules, multiple operating modes, and many exceptional situations, clear control logic reduces the risk of hard-to-find errors and unstable special solutions.
Typical Applications

Typical Use Cases for Process Logic with NexaCode

The module is particularly relevant for machinery and systems where processes, states, and reactions to events must be implemented in a structured, secure, and traceable manner.

Examples:

  • Implementation of complex step sequences in assembly, conveyor, testing or processing systems

  • Structuring of operating modes, releases and state transitions in modular machines

  • Developing robust error handling and defined restart strategies

  • Clean separation between standard functions and customer-specific process control

  • Preparation of reviews, simulations, and virtual commissioning for PLC sequences
User

For whom process logic in NexaCode is particularly relevant

This module is particularly interesting for:

  • Machinery and plant manufacturers

  • PLC Programmer

  • Technical Leads and Software Architects in Automation

  • Project Manager for Machinery and Plant Engineering Projects

  • Commissioning Engineers and Service Teams

  • Companies that want to implement complex machine processes more robustly, understandably, and scalably
Classification in NexaCode

Process Logic as the Flexible Core within NexaCode

Within NexaCode, standardization defines the common software basis. Code generation then uses this basis to create recurring basic functions and a consistent fundamental architecture. The process logic builds precisely on this: This is where the individual machine sequences, step chains, states, and special cases that functionally define a plant are implemented. Precisely for this reason, process logic is not a contradiction to standardization, but rather its sensible complementary area. Standards create stability in the foundation, while process logic provides the necessary flexibility for real machine processes. Together, they create PLC software that remains both structured and adaptable, thus offering a better foundation for testing, commissioning, expansion, and scaling.

Nächster Schritt

Leverage Process Logic for PLC Projects

Learn how to use NexaCode to implement sequential control, state logic, interlocks, and restart strategies in a structured way, making your machine processes more robust, understandable, and testable.

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